Aluminum / Aluminium Strontium (AlSr)

Modifications of the eutectic silicon phase from coarse platelets to a fine fibrous structure in hypoeutectic aluminum / aluminium silicon alloy castings result in improved soundness and mechanical properties, particularly ductility. The use of strontium to "modify" the structure of hypoeutectic aluminum / aluminium silicon casting alloys is an effective and widely accepted practice.